US4812274A - Method of making extruded conduits - Google Patents
Method of making extruded conduits Download PDFInfo
- Publication number
- US4812274A US4812274A US07/034,343 US3434387A US4812274A US 4812274 A US4812274 A US 4812274A US 3434387 A US3434387 A US 3434387A US 4812274 A US4812274 A US 4812274A
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- United States
- Prior art keywords
- conduit
- oriented surface
- wall
- surface zone
- cooling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/08—Surface shaping of articles, e.g. embossing; Apparatus therefor by flame treatment ; using hot gases
- B29C59/085—Surface shaping of articles, e.g. embossing; Apparatus therefor by flame treatment ; using hot gases of profiled articles, e.g. hollow or tubular articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
- B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
- B29C48/903—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies externally
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/91—Heating, e.g. for cross linking
- B29C48/9105—Heating, e.g. for cross linking of hollow articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/0072—After-treatment of articles without altering their shape; Apparatus therefor for changing orientation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/02—Thermal after-treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/02—Thermal after-treatment
- B29C2071/025—Quenching, i.e. rapid cooling of an object
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/02—Thermal after-treatment
- B29C2071/027—Tempering, i.e. heating an object to a high temperature and quenching it
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2791/00—Shaping characteristics in general
- B29C2791/004—Shaping under special conditions
- B29C2791/006—Using vacuum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
- B29C35/045—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using gas or flames
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
- B29C48/905—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article using wet calibration, i.e. in a quenching tank
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
- B29C48/908—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article characterised by calibrator surface, e.g. structure or holes for lubrication, cooling or venting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9115—Cooling of hollow articles
- B29C48/912—Cooling of hollow articles of tubular films
- B29C48/913—Cooling of hollow articles of tubular films externally
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0044—Anisotropic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0072—Roughness, e.g. anti-slip
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S138/00—Pipes and tubular conduits
- Y10S138/07—Resins
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/91—Product with molecular orientation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/139—Open-ended, self-supporting conduit, cylinder, or tube-type article
Definitions
- the present invention relates to conduits (i.e., pipes, tubes, and the like) made of extruded semi-crystalline plastic material such as polyamides, polyolefins such as polyethylene of high and low density, polypropylene, and thermoplastic polyesters which are well known and have numerous applications.
- conduits i.e., pipes, tubes, and the like
- extruded semi-crystalline plastic material such as polyamides, polyolefins such as polyethylene of high and low density, polypropylene, and thermoplastic polyesters which are well known and have numerous applications.
- One use is as rigid or flexible compressed air distribution ducts; the latter constituting, for instance, a portion of the brake system of road vehicles such as trucks, in which the flexibility and the possibility of shaping of semi-crystalline plastic materials are especially appreciated.
- a preferred family of these plastic materials is that of the polyamides and among the latter, polyamide 11.
- the present invention provides novel thermoplastic polymer conduits prepared by extrusion which do not have an oriented surface zone and a process for preparing such conduits.
- the present invention comprises an extruded thermoplastic polymer conduit having a conduit wall of substantially uniform crystalline morphology throughout the entire thickness thereof and the process of making such conduits comprising extruding and shaping a semi-crystalline thermoplastic polymer into the form of a conduit with an oriented surface zone extending into a portion of the wall thereof, heating said conduit for a time and at a temperature sufficient to melt said oriented surface zone, and cooling said conduit to recrystallize said oriented surface zone to substantially the same crystalline morphology as the remainder of said conduit wall.
- FIG. 1 is an elevational view of an extrusion line for carrying out the process of the instant invention
- FIG. 2 is a front view taken along line II--II of FIG. 1;
- FIG. 3 is an elevational view of an alternate extrusion line for carrying out the process of the instant invention.
- FIG. 4 is a graph showing the resistance to breakage of conduits of the present invention as compared to control conduits.
- thermoplastic polymers used in the present invention are advantageously selected from the group consisting of polyamides, polyolefins and thermoplastic polyesters.
- FIG. 1 shows an extrusion line 10 consisting of an extruder 11 equipped with an extrusion head 12, both conventional.
- a shaper tank 13 receives the extruded conduit.
- Tank 13 can be of the conventional type which provides calibrating in vacuo, which permits obtaining an excellent precision of dimensions of the conduit, but involves the drawback of orienting the plastic material at the surface and possibly of scratching it because of the considerable friction between the conduit and the wall of th caliber guage in tank 13.
- the thermal treatment is controlled with a great degree of precision.
- a conventional cooling tank 14 permits a temperature adjustment prior to the thermal treatment station.
- the thermal treating station shown in FIGS. 1 and 2 comprises a direct flamer 15 having six to eight 5" BUNSEN burners 20 arranged symmetrically about the extruded conduit 19 (FIG. 2).
- the centering of the six to eight burners 20 can be regulated very precisely by means of a conventional mounting on slides (not shown) equipped with micrometer calibrated adjustment screws.
- the pressure of gas allowed to enter burners 20 can likewise be regulated by pressure-reduction valves so that in the case of extrusion of the polyamide 11 conduit, a temperature of the order of 220° C. can be attained at the surface of the extruded conduit.
- Vat 16 After the direct flamer 15, hardening in a water cooling vat 16 takes place. Vat 16 has a length of 0.50 m and water flows through it at 23° C.
- the conduit is pulled through the system by means of a conventional pulling device 17 and transferred to a conventional automatic cutter 18 which cuts the conduit to the length desired.
- the extrusion line 30 has elements 31, 32, 33, 34, 36, 37, and 38 which correspond to elements 11, 12, 13, 14, 16, 17, and 18 of FIG. 1.
- a conventional quartz furnace 35 is used in place of the direct flaming device 15.
- Air cooling by a conventional blast ring by a fan was likewise tested successfully as illustrated in the examples below.
- the thermal treatment is considered to be "controlled" when the melting of the oriented surface zone is complete and when after water hardening, natural recrystallization has replaced said oriented surface zone.
- the oriented surface zone is characterized by lines (scratches, streaks) parallel to the axis of the pipe, with the crystallized deep zone distinguishing itself by oblique lines.
- Pipes of dimensions 9 ⁇ 12 mm are made of plastified polyamide 11 of commercial reference BESNO P40 TL using the extrusion line of FIG. 3 with water vat 36 and alternately an air cooling ring as described above.
- the resultant pipes are tested together with control pipe extruded in the same manner, but not subjected to thermal treatment in accordance with the present invention and the results are set forth in Table I.
- Example 1 The procedure of Example 1 is followed except that the polyamide used in plastified polyamide 12 (commercial reference AESNO P40 TL) to make the 9 ⁇ 12 mm pipes.
- the polyamide used in plastified polyamide 12 commercial reference AESNO P40 TL
- the falling mass impact tests are carried out according to a test derived from NFR Standard 12 632 of ISO/DIS Standard 7628/2.
- the pipes are introduced into an apparatus of the guillotine type in which from a height of 0.70 m there falls a weight of 8 kg of cylindrical form and of a curvature opposite that of the pipe and orthogonal to it. There are no impediments limiting the course of the weight during the crushing of the pipe.
- the gain contributed by the controlled thermal treatment comprising the two phases of melting and of water quenching is clearly demonstrated.
- the gain contributed by a recrystallization after air cooling is smaller.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
- Artificial Filaments (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
Description
TABLE I ______________________________________ Thermal treatment Thermal treatment Con- Quartz furnace Quartz furnace trol and water hardening and air cooling ______________________________________ Breaking 320 470 470 stress (bars) Breaking 253 442 443 elongation (%) Impact breakage in the cold state (%) -25° C. 0 0 0 -40° C. 6 1.2 5 -60° C. 57 3 22 Birefringence 23 4 4 Δn × 10.sup.3 ______________________________________
TABLE II ______________________________________ Thermal treatment Thermal treatment Con- Quartz furnace Quartz furnance trol and water hardening and air cooling ______________________________________ Breaking 295 440 390 stress (bars) Breaking 268 480 425 elongation (%) Impact breakage in the cold state (%) -25° C. 5 0 4.5 -30° C. 40 12.5 30 Birefringence 25 3 3 Δn × 10.sup.3 ______________________________________
Claims (6)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR8604880 | 1986-04-04 | ||
FR8604880A FR2596692B1 (en) | 1986-04-04 | 1986-04-04 | EXTRUDED SEMICRYSTALLINE PLASTIC TUBES HAVING RESISTANCE TO COLD SHOCK AND IMPROVED TRACTION THROUGH HEAT TREATMENT AND THEIR MANUFACTURING METHOD |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/279,976 Division US4942070A (en) | 1986-04-04 | 1988-12-05 | Extruded conduits and method of making the same |
Publications (1)
Publication Number | Publication Date |
---|---|
US4812274A true US4812274A (en) | 1989-03-14 |
Family
ID=9333929
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/034,343 Expired - Lifetime US4812274A (en) | 1986-04-04 | 1987-04-03 | Method of making extruded conduits |
US07/279,976 Expired - Fee Related US4942070A (en) | 1986-04-04 | 1988-12-05 | Extruded conduits and method of making the same |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/279,976 Expired - Fee Related US4942070A (en) | 1986-04-04 | 1988-12-05 | Extruded conduits and method of making the same |
Country Status (9)
Country | Link |
---|---|
US (2) | US4812274A (en) |
EP (1) | EP0245125B1 (en) |
JP (1) | JPS62255114A (en) |
CN (1) | CN1011955B (en) |
AT (1) | ATE65737T1 (en) |
CA (1) | CA1322643C (en) |
DE (1) | DE3771773D1 (en) |
ES (1) | ES2023203B3 (en) |
FR (1) | FR2596692B1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5082613A (en) * | 1990-07-23 | 1992-01-21 | Shell Oil Company | Method for improvement of polybutylene pipe strength |
US5167888A (en) * | 1989-11-30 | 1992-12-01 | The British Petroleum Company P.L.C. | Polymer composites |
US6632384B2 (en) * | 2000-03-29 | 2003-10-14 | Sumitomo Chemical Company, Limited | Process for producing resin molded article |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01153934U (en) * | 1988-03-28 | 1989-10-24 | ||
JPH0781016B2 (en) * | 1991-03-18 | 1995-08-30 | 東レ株式会社 | Polyamide blow molded product |
DE4202397C2 (en) * | 1992-01-29 | 1999-01-14 | Technoflow Fuel Systems Gmbh | Motor vehicle pipeline from a single-layer or a multi-layer extruded plastic pipe |
DE4202399C1 (en) * | 1992-01-29 | 1993-02-04 | Technoform Caprano + Brunnhofer Kg, 3501 Fuldabrueck, De | |
US8579624B2 (en) * | 2008-02-11 | 2013-11-12 | Advanced Drainage Systems, Inc. | Systems and methods for making multi-wall corrugated pipe |
JP5797305B2 (en) * | 2008-08-04 | 2015-10-21 | 富士フイルム株式会社 | Manufacturing method of optical film |
CN105216277A (en) * | 2015-10-13 | 2016-01-06 | 浙江伟星新型建材股份有限公司 | A kind of polypropylene pipe burning optimization on line production method |
DE102016204424A1 (en) * | 2016-03-17 | 2017-09-21 | Contitech Mgw Gmbh | Partially flexible hose |
CN111113846B (en) * | 2019-12-31 | 2022-01-07 | 潍坊现代塑胶有限公司 | Plastic pipe and manufacturing device and method thereof |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3103409A (en) * | 1960-05-06 | 1963-09-10 | Method for making thermoplastic pipes | |
US3382220A (en) * | 1964-02-03 | 1968-05-07 | Phillips Petroleum Co | Transparent linear polymers |
US3383375A (en) * | 1962-05-18 | 1968-05-14 | Shell Oil Co | Treatment of polypropylene articles |
US3553303A (en) * | 1967-12-21 | 1971-01-05 | Phillips Petroleum Co | Extruding thermoplastic tubing |
US3655848A (en) * | 1969-08-18 | 1972-04-11 | Phillips Petroleum Co | Surface treatment of interior of parison preform |
US3965226A (en) * | 1974-11-25 | 1976-06-22 | Kabel-Und Metallwerke Gutehoffnungshutte Aktiengesellschaft | Method of providing a thick concentric envelope on an electrical conductor |
US4115495A (en) * | 1977-04-06 | 1978-09-19 | The B. F. Goodrich Company | Processing extruded thermoplastic polymer |
US4159889A (en) * | 1973-09-26 | 1979-07-03 | Mitsui Petrochemical Industries, Inc. | Method of and apparatus for treating the outer surface and inner surface of a pipe of a thermoplastic resinous material produced by extrusion |
US4305899A (en) * | 1977-04-06 | 1981-12-15 | Wavin B.V. | Method of manufacturing a plastic tube with longitudinal channels in the wall |
Family Cites Families (4)
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IT464517A (en) * | 1949-01-18 | |||
US4238538A (en) * | 1978-12-21 | 1980-12-09 | E. I. Du Pont De Nemours And Company | Method of and apparatus for ram-extrusion of aromatic polyimide and polyamide resins, and shaped articles formed using such method and apparatus |
DE3216720C2 (en) * | 1982-05-05 | 1984-08-23 | Dynamit Nobel Ag, 5210 Troisdorf | Method and device for producing stress-free hollow profiles, in particular tubes made of thermoplastic amorphous and in particular partially crystalline plastic |
DE3347684A1 (en) * | 1983-12-31 | 1985-08-29 | Bayer Ag, 5090 Leverkusen | METHOD FOR PRODUCING PLASTIC FILMS WITH IMPROVED OPTICAL PROPERTIES |
-
1986
- 1986-04-04 FR FR8604880A patent/FR2596692B1/en not_active Expired
-
1987
- 1987-03-03 CA CA000531049A patent/CA1322643C/en not_active Expired - Fee Related
- 1987-03-25 ES ES87400666T patent/ES2023203B3/en not_active Expired - Lifetime
- 1987-03-25 EP EP19870400666 patent/EP0245125B1/en not_active Expired - Lifetime
- 1987-03-25 DE DE8787400666T patent/DE3771773D1/en not_active Revoked
- 1987-03-25 AT AT87400666T patent/ATE65737T1/en not_active IP Right Cessation
- 1987-04-03 US US07/034,343 patent/US4812274A/en not_active Expired - Lifetime
- 1987-04-04 JP JP62083684A patent/JPS62255114A/en active Pending
- 1987-04-04 CN CN87102576A patent/CN1011955B/en not_active Expired
-
1988
- 1988-12-05 US US07/279,976 patent/US4942070A/en not_active Expired - Fee Related
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3103409A (en) * | 1960-05-06 | 1963-09-10 | Method for making thermoplastic pipes | |
US3383375A (en) * | 1962-05-18 | 1968-05-14 | Shell Oil Co | Treatment of polypropylene articles |
US3382220A (en) * | 1964-02-03 | 1968-05-07 | Phillips Petroleum Co | Transparent linear polymers |
US3553303A (en) * | 1967-12-21 | 1971-01-05 | Phillips Petroleum Co | Extruding thermoplastic tubing |
US3655848A (en) * | 1969-08-18 | 1972-04-11 | Phillips Petroleum Co | Surface treatment of interior of parison preform |
US4159889A (en) * | 1973-09-26 | 1979-07-03 | Mitsui Petrochemical Industries, Inc. | Method of and apparatus for treating the outer surface and inner surface of a pipe of a thermoplastic resinous material produced by extrusion |
US3965226A (en) * | 1974-11-25 | 1976-06-22 | Kabel-Und Metallwerke Gutehoffnungshutte Aktiengesellschaft | Method of providing a thick concentric envelope on an electrical conductor |
US4115495A (en) * | 1977-04-06 | 1978-09-19 | The B. F. Goodrich Company | Processing extruded thermoplastic polymer |
US4305899A (en) * | 1977-04-06 | 1981-12-15 | Wavin B.V. | Method of manufacturing a plastic tube with longitudinal channels in the wall |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5167888A (en) * | 1989-11-30 | 1992-12-01 | The British Petroleum Company P.L.C. | Polymer composites |
US5082613A (en) * | 1990-07-23 | 1992-01-21 | Shell Oil Company | Method for improvement of polybutylene pipe strength |
US6632384B2 (en) * | 2000-03-29 | 2003-10-14 | Sumitomo Chemical Company, Limited | Process for producing resin molded article |
Also Published As
Publication number | Publication date |
---|---|
CN1011955B (en) | 1991-03-13 |
CN87102576A (en) | 1987-10-14 |
CA1322643C (en) | 1993-10-05 |
US4942070A (en) | 1990-07-17 |
ES2023203B3 (en) | 1992-01-01 |
ATE65737T1 (en) | 1991-08-15 |
FR2596692A1 (en) | 1987-10-09 |
DE3771773D1 (en) | 1991-09-05 |
EP0245125B1 (en) | 1991-07-31 |
FR2596692B1 (en) | 1988-09-09 |
EP0245125A1 (en) | 1987-11-11 |
JPS62255114A (en) | 1987-11-06 |
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